text: /*	$FreeBSD: soc2013/dpl/head/sys/crypto/sha2/sha2.h 92799 2002-03-20 05:14:42Z alfred $	*/
  /*	$KAME: sha2.h,v 1.3 2001/03/12 08:27:48 itojun Exp $	*/
  
  /*
   * sha2.h
   *
   * Version 1.0.0beta1
   *
   * Written by Aaron D. Gifford <me@aarongifford.com>
   *
   * Copyright 2000 Aaron D. Gifford.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the copyright holder nor the names of contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   */
  
  #ifndef __SHA2_H__
  #define __SHA2_H__
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  /*** SHA-256/384/512 Various Length Definitions ***********************/
  #define SHA256_BLOCK_LENGTH		64
  #define SHA256_DIGEST_LENGTH		32
  #define SHA256_DIGEST_STRING_LENGTH	(SHA256_DIGEST_LENGTH * 2 + 1)
  #define SHA384_BLOCK_LENGTH		128
  #define SHA384_DIGEST_LENGTH		48
  #define SHA384_DIGEST_STRING_LENGTH	(SHA384_DIGEST_LENGTH * 2 + 1)
  #define SHA512_BLOCK_LENGTH		128
  #define SHA512_DIGEST_LENGTH		64
  #define SHA512_DIGEST_STRING_LENGTH	(SHA512_DIGEST_LENGTH * 2 + 1)
  
  
  /*** SHA-256/384/512 Context Structures *******************************/
  /* NOTE: If your architecture does not define either u_intXX_t types or
   * uintXX_t (from inttypes.h), you may need to define things by hand
   * for your system:
   */
  #if 0
  typedef unsigned char u_int8_t;		/* 1-byte  (8-bits)  */
  typedef unsigned int u_int32_t;		/* 4-bytes (32-bits) */
  typedef unsigned long long u_int64_t;	/* 8-bytes (64-bits) */
  #endif
  /*
   * Most BSD systems already define u_intXX_t types, as does Linux.
   * Some systems, however, like Compaq's Tru64 Unix instead can use
   * uintXX_t types defined by very recent ANSI C standards and included
   * in the file:
   *
   *   #include <inttypes.h>
   *
   * If you choose to use <inttypes.h> then please define: 
   *
   *   #define SHA2_USE_INTTYPES_H
   *
   * Or on the command line during compile:
   *
   *   cc -DSHA2_USE_INTTYPES_H ...
   */
  #if 0 /*def SHA2_USE_INTTYPES_H*/
  
  typedef struct _SHA256_CTX {
  	uint32_t	state[8];
  	uint64_t	bitcount;
  	uint8_t	buffer[SHA256_BLOCK_LENGTH];
  } SHA256_CTX;
  typedef struct _SHA512_CTX {
  	uint64_t	state[8];
  	uint64_t	bitcount[2];
  	uint8_t	buffer[SHA512_BLOCK_LENGTH];
  } SHA512_CTX;
  
  #else /* SHA2_USE_INTTYPES_H */
  
  typedef struct _SHA256_CTX {
  	u_int32_t	state[8];
  	u_int64_t	bitcount;
  	u_int8_t	buffer[SHA256_BLOCK_LENGTH];
  } SHA256_CTX;
  typedef struct _SHA512_CTX {
  	u_int64_t	state[8];
  	u_int64_t	bitcount[2];
  	u_int8_t	buffer[SHA512_BLOCK_LENGTH];
  } SHA512_CTX;
  
  #endif /* SHA2_USE_INTTYPES_H */
  
  typedef SHA512_CTX SHA384_CTX;
  
  
  /*** SHA-256/384/512 Function Prototypes ******************************/
  
  void SHA256_Init(SHA256_CTX *);
  void SHA256_Update(SHA256_CTX*, const u_int8_t*, size_t);
  void SHA256_Final(u_int8_t[SHA256_DIGEST_LENGTH], SHA256_CTX*);
  char* SHA256_End(SHA256_CTX*, char[SHA256_DIGEST_STRING_LENGTH]);
  char* SHA256_Data(const u_int8_t*, size_t, char[SHA256_DIGEST_STRING_LENGTH]);
  
  void SHA384_Init(SHA384_CTX*);
  void SHA384_Update(SHA384_CTX*, const u_int8_t*, size_t);
  void SHA384_Final(u_int8_t[SHA384_DIGEST_LENGTH], SHA384_CTX*);
  char* SHA384_End(SHA384_CTX*, char[SHA384_DIGEST_STRING_LENGTH]);
  char* SHA384_Data(const u_int8_t*, size_t, char[SHA384_DIGEST_STRING_LENGTH]);
  
  void SHA512_Init(SHA512_CTX*);
  void SHA512_Update(SHA512_CTX*, const u_int8_t*, size_t);
  void SHA512_Final(u_int8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*);
  char* SHA512_End(SHA512_CTX*, char[SHA512_DIGEST_STRING_LENGTH]);
  char* SHA512_Data(const u_int8_t*, size_t, char[SHA512_DIGEST_STRING_LENGTH]);
  
  #ifdef	__cplusplus
  }
  #endif /* __cplusplus */
  
  #endif /* __SHA2_H__ */
  
  